Phase 12~13 전체 구현: Pro+ 피처 6종 + 음성 대화 + RAG + OS 자동화

Phase 12:
- FileTranscriptionService: ffmpeg PCM 변환 + 30초 청크 순차 STT
- MeetingSummaryService: 자막 세션 → LLM 자동 요약 + DB summaryText
- DictationTemplateService: 필드별 음성 입력 상태 머신 + 프리셋 3개

Phase 13.1:
- VoiceConversationService: STT→Ollama /api/chat→TTS 대화 루프 (10턴)
- TTSPlaybackService: Windows SAPI 문장 단위 큐 재생
- LocalLLMService.chatStream: Ollama /api/chat 스트리밍

Phase 13.2:
- RAGService: Ollama 임베딩 + SQLite 벡터 + 코사인 유사도 검색
- KnowledgeBasePage: 문서 관리 + 질문/답변 UI
- PDF 파서: zlib FlateDecode 해제 + BT/ET 텍스트 추출

Phase 13.3:
- VoiceActionService: LLM JSON 액션 플랜 생성 + 실행
- 프리셋 6개 (크롬/메모장/탐색기/볼륨), 위험 명령 차단

공통: IPC ~70채널, 에러코드 780-878, i18n 100+키
버그픽스: 라이선스 로컬 키 우선, i18n featureLabel, DOM 중첩

src/shared/ipc-channels.ts

@@ -221,6 +221,90 @@ export const IPC_CHANNELS = {
     STOP_SYSTEM_AUDIO: 'caption:stopSystemAudio',
   },
 
+  // ── Phase 12: File Transcription (12.1) ──
+  FILE_TRANSCRIPTION: {
+    START: 'fileTranscription:start',
+    CANCEL: 'fileTranscription:cancel',
+    GET_STATE: 'fileTranscription:getState',
+    // Main → Renderer events
+    PROGRESS: 'fileTranscription:progress',
+    COMPLETE: 'fileTranscription:complete',
+    ERROR: 'fileTranscription:error',
+  },
+
+  // ── Phase 12: Meeting Summary (12.2) ──
+  MEETING_SUMMARY: {
+    SUMMARIZE: 'meetingSummary:summarize',
+    GET_SUMMARY: 'meetingSummary:getSummary',
+    EXPORT_MARKDOWN: 'meetingSummary:exportMarkdown',
+    // Main → Renderer events
+    SUMMARY_READY: 'meetingSummary:summaryReady',
+    SUMMARY_PROGRESS: 'meetingSummary:progress',
+  },
+
+  // ── Phase 12: Dictation Templates (12.3) ──
+  DICTATION_TEMPLATE: {
+    GET_ALL: 'dictationTemplate:getAll',
+    CREATE: 'dictationTemplate:create',
+    UPDATE: 'dictationTemplate:update',
+    DELETE: 'dictationTemplate:delete',
+    START_SESSION: 'dictationTemplate:startSession',
+    CANCEL_SESSION: 'dictationTemplate:cancelSession',
+    GET_SESSION_STATE: 'dictationTemplate:getSessionState',
+    SET_FIELD_VALUE: 'dictationTemplate:setFieldValue',
+    // Main → Renderer events
+    SESSION_STATE_CHANGED: 'dictationTemplate:sessionStateChanged',
+    FIELD_COMPLETED: 'dictationTemplate:fieldCompleted',
+    SESSION_COMPLETED: 'dictationTemplate:sessionCompleted',
+  },
+
+  // ── Phase 13: Voice Conversation (13.1) ──
+  VOICE_CONVERSATION: {
+    START_SESSION: 'voiceConversation:startSession',
+    STOP_SESSION: 'voiceConversation:stopSession',
+    SEND_MESSAGE: 'voiceConversation:sendMessage',
+    GET_STATE: 'voiceConversation:getState',
+    GET_HISTORY: 'voiceConversation:getHistory',
+    CLEAR_HISTORY: 'voiceConversation:clearHistory',
+    CANCEL_RESPONSE: 'voiceConversation:cancelResponse',
+    // Main → Renderer events
+    STATE_CHANGED: 'voiceConversation:stateChanged',
+    USER_MESSAGE: 'voiceConversation:userMessage',
+    ASSISTANT_DELTA: 'voiceConversation:assistantDelta',
+    ASSISTANT_MESSAGE: 'voiceConversation:assistantMessage',
+    TTS_STARTED: 'voiceConversation:ttsStarted',
+    TTS_FINISHED: 'voiceConversation:ttsFinished',
+    ERROR: 'voiceConversation:error',
+  },
+
+  // ── Phase 13: Local RAG (13.2) ──
+  RAG: {
+    ADD_DOCUMENT: 'rag:addDocument',
+    REMOVE_DOCUMENT: 'rag:removeDocument',
+    GET_DOCUMENTS: 'rag:getDocuments',
+    QUERY: 'rag:query',
+    GET_STATE: 'rag:getState',
+    REINDEX: 'rag:reindex',
+    // Main → Renderer events
+    INDEX_PROGRESS: 'rag:indexProgress',
+    INDEX_COMPLETE: 'rag:indexComplete',
+    QUERY_RESULT: 'rag:queryResult',
+  },
+
+  // ── Phase 13: Voice Action / OS Automation (13.3) ──
+  VOICE_ACTION: {
+    EXECUTE: 'voiceAction:execute',
+    GET_PRESETS: 'voiceAction:getPresets',
+    GET_HISTORY: 'voiceAction:getHistory',
+    CLEAR_HISTORY: 'voiceAction:clearHistory',
+    SET_ENABLED: 'voiceAction:setEnabled',
+    IS_ENABLED: 'voiceAction:isEnabled',
+    // Main → Renderer events
+    ACTION_PLANNED: 'voiceAction:actionPlanned',
+    ACTION_EXECUTED: 'voiceAction:actionExecuted',
+    ACTION_ERROR: 'voiceAction:actionError',
+  },
+
   // ── Phase 11: License & Monetization ──
   LICENSE: {
     GET_INFO: 'license:getInfo',